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404 N Wlget Lane <br />Sequoia <br />Walnut (c <br />gZS) 9813-9600 <br />FAX (925) 988-9673 <br />Analytical `vww sequo1alabs a= <br />OW <br />Getticr Ryan, Inc - Dubhn Project. Unocal <br />6747 Sierra Court Sutte J Project Number- Unocal # 0123 Reported- <br />Dublin CA, 94568 Project Manager Deanna L Hardmg 29 -Dec -00 07 40 <br />Total Purgeable Hydrocarbons (C6 -C12), BTEX and MTBE by DHS LUFT - Quality Control <br />Sequoia Analytical - Sacramento <br />Repoitmg Spike Source °/9REC RPD <br />Analyte Result Lttntt Units Level Result %REC Loans RPD Lmut Nates <br />Batch 0120204 - EPA 5030B (PI'i') <br />Blank (0120204-BLK1) <br />Prepared & Analyzed 17 -Dec -00 <br />Prepared & Analyzed. 17 -Dec -00 <br />Purgeable Hydrocarbons <br />ND <br />500 ,84 <br />Benzene <br />ND <br />0 500 • <br />Toluene <br />ND <br />0 500 " <br />Ethylbanzeme <br />ND <br />0 500 " <br />Xylenes (total) <br />ND <br />0 500 " <br />Methyl text -butyl other <br />ND <br />250 <br />Surrogate gAa-TWJhonon3,hw a <br />119 <br />lao 119 60-140 <br />LCS (0120204 -BSI) <br />Prepared & Analyzed 17 -Dec -00 <br />Benzene <br />116 <br />0 500 <br />ug/l <br />100 <br />116 <br />70-130 <br />Toluene <br />112 <br />0 500 <br />" <br />too <br />112 <br />70-130 <br />113 <br />0 500 <br />100 <br />113 <br />70-130 <br />es (total) <br />349 <br />0 500 <br />300 <br />116 <br />70-130 <br />Methyl tat-hisyl ather <br />100 <br />250 <br />100 <br />100 <br />70-130 <br />SwmSate a ga-Trifhorotohene <br />119 <br />100 <br />119 <br />60-140 <br />Matrix Spike (0120204-MS1) <br />Source W01216745 <br />Prepared 17 Dec -00 Analyzed 18 -Dec -00 <br />Benzene <br />113 <br />0 500 <br />ug4 <br />100 <br />ND <br />113 <br />60-140 <br />Tohme <br />113 <br />0 500 <br />" <br />100 <br />ND <br />113 <br />60-140 <br />Ethylbenzene <br />113 <br />0 500 <br />too <br />ND <br />113 <br />60.140 <br />Xylenes (total) <br />34.5 <br />0 500 <br />300 <br />ND <br />115 <br />60-140 <br />Mathyl tat4ndyl other <br />105 <br />2 50 <br />100 <br />ND <br />105 <br />60-140 <br />S -Mate a qa-Trifheorotohene <br />114 <br />100 <br />114 <br />60-140 <br />Matra Spike Dup (0120204-NM1) <br />Source W012167-05 <br />Prepared. 17 -Der, -00 Analyzed. 18 -Dec -00 <br />Benzene <br />109 <br />0 500 <br />ug/1 <br />100 <br />ND <br />109 <br />60-140 3 60 <br />25 <br />Tohume <br />109 <br />0 500 <br />100 <br />ND <br />109 <br />60-140 3 60 <br />25 <br />Ethylhaozene <br />10.7 <br />0 500 <br />" <br />100 <br />ND <br />107 <br />60-140 545 <br />25 <br />Xylenes (total) <br />32.9 <br />0 500 <br />300 <br />ND <br />110 <br />60-140 475 <br />25 <br />Methyl tat -butyl other <br />104 <br />250 <br />100 <br />ND <br />104 <br />60-140 0 957 <br />25 <br />Swrogate a Aa-7wJiuomtohwm <br />113 <br />la0 <br />113 <br />60.140 <br />18 AIf*Ucal - Walnut Creek The results in ads report apply to the samples anabxed in axondanm frith dm chain of <br />custody doer mml This anabWeal rrport rr wer be mprodueed in iU marwy <br />Page 15 of 17 <br />